TOPHILL Seagull 1963 Chronograph Watch for Men|ST1901 Hand-Winding Mechanical Movement|40mm Vintage Racing Watch|Sapphire Crystal|316L Stainless Steel Case|5ATM Waterproof|Genuine Leather Strap with Milanese Band

【Authentic Seagull ST1901 Column-Wheel Chronograph】 — The legendary ST1901 hand-wound caliber delivers genuine column-wheel chronograph operation—a mechanism found in watches costing ten times more. With 19 jewels, 21,600 vph, and a 42-hour power reserve, every press of the pusher engages precise, tactile mechanical logic. 【Aviation Heritage Reborn】 — Inspired by the legendary 1963 Air Force chronograph, this watch revives a piece of military horological history. The 40mm case, cathedral hands, and vintage Arabic numerals honor the original design while delivering modern 316L steel construction and sapphire crystal durability. 【Dual-Strap Versatility】 — The breathable top-grain genuine leather racing strap delivers vintage motorsport character, while the additional Milanese mesh band transforms the watch into a sleek, contemporary dress piece. Two distinct personalities, one mechanical heart—curated for seamless style transitions. 【Precision Timing Instruments】 — The tachymeter scale encircling the dial enables accurate speed calculations for motorsport, aviation, or athletic timing. Central chronograph seconds sweep smoothly at 6 beats per second, while the 30-minute and 12-hour sub-dials track elapsed intervals with mechanical precision. 【Sapphire Crystal & 316L Steel Construction】 — Scratch-resistant sapphire crystal protects the finely textured sandblasted dial, while the 316L stainless steel case resists corrosion and maintains its polished presence through years of daily wear. 5ATM water resistance handles rain, splashes, and the unexpected with robust elegance.